Popular Article: Werewolf
A werewolf (also known as lycanthrope or wolfman) in folklore is a person who shape-shifts into a Gray Wolf or wolf-like creature, either purposely, by using magic, or after being placed under a curse, often at the time of a full moon. Given that they were a threat to people, tales often focus on methods of revealing werewolves, protecting oneself from them, and killing them.
German woodcut of a werewolf from 1722
While in contemporary times the werewolf is a staple of horror genres and role-playing games, the werewolf phenomenon can be traced all the way back to shape-shifting practices of shamans who transformed into animals including wolves. Some have suggested that diseases, such as rabies and porphyria, which cause symptoms that resemble some characteristics of wolves and also cause delusions, could be the origin of tales of werewolves.